Drill press



Oct. 28, 1947. L, BA FEL 2,429,741

1 DRILL PRESS Zvravfop I Z5575? G BAR/45 Patented Oct. 28, 1947 I UNITED STATES OFFICE DRILL PRESS Lester G. Barfels, Grundy Centen-Iowa Application August 23, 1945, Serial No.- 612,195

(o1. ir -=55) '4 Claims. 1

This invention relates generally to drill presses and in particular to an attachment for lubricating and cooling a drill bit.

An object of thisinvention is to provide an improved drill bit oiler attachment.

Afurther object of this invention is to providea drill bit oiler adapted to control the supply of oil to the bit in response to the movement of the bit into and out of its top moved position.

'Yet another object of this invention is to provide a drill bit oiler which is of a simple and compact construction, adapted to be applied to moved operating position therefor, and to stop .15

the supply of oil when the bit is moved to its top or normal rest position. a

A feature of this invention is found in the pro vision of a drill bit oiling attachment in which an oil reservoir supported on the drill shaft carriage for up and down movement with the drill bit has an oil outlet in its bottom side connected with a tube for directing oil to the bit. A stationary valve member, supported in the path of movement .of the oil reservoir, is adapted to seat 425 against the reservoir outlet, When the drill bitv is in its top position, to stop the flow of oil to the bit, with the outlet being moved out of seating engagement with the valve member when the drill bit is moved downwardly away fromits top position.

Further objects, features and advantages of this invention will become apparent from the following description when taken in connection with the accompanying drawing in which:

Fig. 1 is a front elevational View of a drill press .showing the oil attachment of this invention assembled thereon, and with parts thereof shown in section to more clearly illustrate its construc- Fig. 2 is a fragmentary elevation view illustrated similarly to Fig. 1 but with parts thereof shown in changed position;

Fig. 3 is a perspective view of the stationary valve member forming part of the attachment of ing attachment of this invention i illustrated in Fig.- 1 assembled on a drill press of a usual type including ,a'base 5,. an upright column or standard'ji. and an upper frame I supportedon'the standard 6.to the forward side thereof. Gearing for operating a drill shaft 8 is arranged within a housing ..9 .connectedto the top of the frame I by'boltsi II. A carriage l2, for supportingthe drillcshaftfll, isguidably supported in the frame T for up and down movement from its lower side. 'At the lower end of the drill shaft'B is aichuck l3 which carries a drill bit l4. The worktof be drilledis carried on .a table I6 adjustablysupported'for vertical movement on the standardi'fi, with the carriage l2 andbit [4 being moved up and down together relative to the work tablelfi through a usual'hand pressure device includin a rotatable operating handle ll.

The oiling attachment of this invention "includes. an .oil reservoir I 8 having an open top side and a bottom wall [9 (Figs.1 andZ). An outlet 2| for the reservoir 18 is extended upwardly through the bottom wall I 9 so that its top end22 is in a spacedrelation with the top side'ofjthe bottom wall' l9 for apurposewhich will appear later. Connected tothe outlet'Zl is a fiexiblecil conduit 23 having "its free end 24 movable to a position adjacent to the drill bit I4. 'It is'seen, therefore, thatthe outlet 2| constitutes an'extensionfor the oil conduit 23,.so that'the conduit 23 and .the reservoir 18 form a'pre-assembled unit.

'Ihereservoir I8 is. supported on the carriage [2 for movement therewith, and in turn for movement with the drill bit M, by means including a bracket clamp 26 (Figs. 1 and 4) extended about the lower end of the reservoir [8 and provided with oppositely arranged clamping members'Tl. A split collar 28' adapted to be positioned about the lower'end of the carriage I2 has split portions'29'received between the clamp members 21. A single bolt 3| extended through the clamping members 21 and the split portions 29, on being tightened, concurrently clamps the collar 28 on the carriage" and the bracket 26 on the'collar 28.

As best appears in Fig. 1 it is seen that the oil reservoir I8 is movable up and down in apath to one side of the frame 1. By virtue of the'support of the reservoir on the carriage 12 the outlet end 24 of the conduit 23 is always maintained 3 in an adjusted position relative to the drill bit I4 for all moved positions of the bit.

Oil from the reservoir I8 is automatically supplied to the drill bit I4 on its movement downwardly from a top or normal rest position, shown in Fig. 2, and then automatically shut-ofi when the drill bit I4 is returned to its position shown in Fig. 2, by means of a stationary valve structure 32. The structure 32 comprises a substantially L-shaped member 33 formed of a single piece of a fiat bar material bent or twisted at 34 to form a short leg 36 and a long leg 31 (Figs. 1 and 3). The leg 36 has its free end connected by one of the bolts II to the frame I, so that the long leg 31 is extended downwardly in a spaced relation 'with the frame I. An extension 38 for the long leg 31 is adjustably supported for up and down movement relative to the leg 31 by bolts 39 extended therethrough and through longitudinally extended slots 4I in the leg 31 (Fig. 5).

through the tube 23 regardless of the relative positions of the seating member 43 and the outlet end 22. It will be appreciated, of course, that the valve 44 may also be used to regulate the rate of flow of oil through the conduit 23, in conjunction with the control of the oil flow by the valve structure 32 as above described.

From a consideration of the above description it is seen that the invention provides an oiling attachment for a drill press which is of a simple and compact construction, and readily applicable to difierent types of drill presses. The attachment operates automatically to control the supply of oil to the drill bit in response to its movement into and out of a top or normal rest position. Further the attachment is rendered inoperative by the actuation of the valve 44 to The lower or free end of the extension 38is formed with a lateral projection 42 the bottom side of which is covered with a leather or rubber member 43, or like gasket fluid sealing material. The valve structure 32 is of a shape and size such that the leg 31 and its extension 38 are receivable within the top side of the reservoir I8, with the member 43 positioned in the path of movement of the outlet 2!. The extension 38 is adjusted relative to the leg 31 so that when the drill bit I4 is in its top position shown in Fig. 2, the member 43 is in fluid sealing engagement with the top end 22 of the outlet 2I to stop the flow of oil therethrough.

In the operation of the oiling attachment of this invention assume the parts to be in their position shown in Fig. 2, in which the drill bit I4 is at its top position and the member 43 in seating engagement with the top end 22 of the reservoir outlet 2I. In this position of the drill bit I4 no flow of oil takes place from the reser voir I8 into the conduit 23. On movement of the drill bit I4 downwardly toward the work table I6 the end 22 of the outlet 2| is moved out of its seating engagement with the seating member 43 so that oil is automatically supplied to the drill bit I4.

Since the oil reservoir I8 and the tube 23 are movable up and down with the drill bit I4, any adjusted position of the tube end 24 relative to the drill bit I4 is maintained at all moved positions of the drill bit. The supply of oil to the bit I4 continues at all moved positions of the bit I4 out of its top or normal rest position. On upward movement of the bit I4 to its top position the outlet 22 is seated against the member 43 to automatically stop the flow of oil through the tube 23.

With the upper end of the outlet 2I spaced above the top surface of the bottom wall I9 of the reservoir I8 dirt and foreign material is permitted to accumulate on the bottom I9 to an appreciable extent without interfering in any way with a fluid sealing'engagement of the member 43 and the outlet 2|. The work table I6 may be provided with a collecting pan (not shown) so that oil supplied to the drill bit I4 may be returned to the reservoir I8 for reuse.

In some instances of drilling, such as in the drilling of wood, a cooling or oiling of the bit I4 is not required. A valve 44, therefore, is connected in the conduit 23 to close the: conduit under such operating conditions. In other words when the valve 44 is closed no oil will now provide for the use of the drill in dry drilling operations.

Although the invention has been described I with respect to a preferred embodiment thereof it is to be understood that it is not to be so limited since changes and modifications can be made in the parts thereof within the full intended scope of this invention as defined by the appended claims.

I claim: 7

1. In a drill press having a frame, a vertically movable bit support, a drill bit carried in said support and a liquid reservoir mounted on said drill bit support for vertical movement therewith, means for supplying liquid from said reservoir to said drill bit comprising a tube having one end extended upwardly through the bottom of said reservoir and its opposite end movable to a position adjacent to the drill bit, a stationary valve structure carried at its upper end on said frame and adapted to extend through the top of said reservoir with its lower end adjacent to the'bottom of the reservoir when the drill bit is in its top position, and a valve member on the lower end of said structure adapted to seat on the one end of said tube when the drill bit is in said top position.

2. In a drill press having a frame, a vertically movable bit support, a drill bit carried in said support and a liquid reservoir mounted on said drill bit support for vertical movement therewith, means for supplying liquid from said reservoir to said drill bit comprising a conduit connected at one end to the bottom of said reservoir, an extension on said one end projected upwardly into said reservoir, a, substantially L-shape valve structure having its short leg connected to said frame and its long leg extended downwardly in a spaced relation with said frame at a position such that said long leg is within the reservoir when said support is moved to the top position therefor, and a valvemember at the lower end of said long leg adapted for seating engagement with said extension at the top position of said support to control the flow of liquid through said conduit in response to the movement of said support into and out of its top position.

ber for controlling the flow of liquid through said conduit supported in a spaced relation with said '5 frame and in the path of movement of said reservoir, with said conduit upper end being moved into and out of seating engagement with said valve member concurrently with the movement of said bit into and out of its top position.

4. In a drill bit oiling device having a movable oil reservoir supported for up and down movement with a drill bit, means for controlling the flow of oil from said reservoir to said drill bit including an outlet in the bottom of said reservoir, an oil tube connected at one end with said outlet and having its other end movable to a position adjacent to said bit, and a stationary valve member supported in the path of movement of said reservoir such that, when said bit is in its top 15 6 position, said outlet is seated against said valve member to stop the flow of oil through said conduit, with said outlet being moved away from said valve member, on movement of the bit from said 5 top position, to provide for a supply of oil to said bib.

LESTER G. BARFELS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number 

